Refrigerating apparatus



E. e. E. LANGBERT.- 'REFRIG ERATING APPARATUS. APPLICATION HLED 056.26. 1918.

1,375,396. v Patented Apr.19 ,1921.

"lullnnlllll/ I, V I, 4 4 ""'0 v be ve UNITED STATES ERNST GOT'IHARD ERIGSSON LANGIBERT, OF STOCKHOLM, SWEDEN.

Rnrnrenmrme ArrAnA'rUs.

Specification of Letters Patent. Patented Apr. 19, 1921.

Application filed December 26, 1918. Serial No. 268,382.

T 0 all whom it may concern Be it known that I, ERNST Go'rrHARn ERICSSON LANGBERT, engineer, sub'ect of the King of Sweden, residing at tockholm, Sweden, have invented certain new and useful Improvements in.Refrigerati ng Apparatus, of which the following is a specifica- .tion.

The invention relates to a refrigerating apparatus of the kind, in which the cooling is effected by means of a liquid coolin agent, which, is vaporized by reduction 0 pressure, while absorbin heat from the body'to be'cooled, and at t e same time storing cold in a cold accumulator.

Apparatus of thiskind are worked in such a way, that during theworking periods periods of cold generation," either the whole or a part of the cold generated by means of a compressor is beingaccumulated in the cold accumulator, while another'part is used for direct cooling, whereas the cooling during idle hours is effected exclusively by means of the'cold accumulator. The non-refrigerating apparatus of this kind have the disadvantage, that they may be only worked economically by, means of a compressor until of this kind. The invention principa ly consists in the cold accumulatorbeing arranged inside of the cooling elements in such a way that a space is formed between the cold ac-.

cumulator and the outer wall of the cooling element, which space serves to receive the liquid cooling agent so that the cooling agent may act as a heat conductor durin the idle hours, when the cooling is efiecte by means of the cold accumulator. By this construction ofcthe cold accumulator an efiicient transmission of heat is. secured under all circumstances, as the transmission of heat may take place freely during the working periods between the cooling agent and The the body to be cooled directly throughthe wall of the cooling element and during the idle hours between the cold accumulator and the body to be cooled through the medium of the cooling agent, the latter then serving only as a heat conductor.

The invention is particularly intended for railway refrigerating apparatus, in which the compressor is driven from the wheel axle of the car, although as apparent the apparatus may be used with advantage in stationary refrigerating plants.

The cooling agent may consist of methyl alcohol or ethyl chlorid.

The accompanying drawing shows a'section of a cooling element according to this invention.

The cooling element consists of a cylindrical receptacle or casin 1 closed at its lower end and, at its opposite end, connected to and communicating with a vacuum piping 2 common to a plurality of cooling elements, through a pipe connection 3. At the outer side of the casing longitudinal ribs 4:

are provided in order to obtain a large cooling surface against the surrounding air. Inside the casing 1 a cylindrical receptacle 5 is provided centrally with respect to the casing. said receptacle being secured to a supporting cross 6. in the pipe connection 3 by means of a nut 7 in such a way that a free space is left at 8 between the receptacle 5 and the pi connection 3. The cooling agent is supp ied to the space 9 between the receptacle 4 and the casing 1 through a pipe 10 which may be controlled in known manner by means of a check-valve. cooling agent stands normally at about the level 11. The receptacle 5 is filled withwater or brine.

The

During the working periods of the plant cold is produced in known manner by the vaporization of the cooling agent caused by the vacuum in the pipe 2. Heat is then first absorbed partly from the content of the cold accumulator 5 and partly from the surrounding air in-chamber to be cooled. After the temperature of the content of the accumulator has been lowered to the temperature of the cooling'agent heat is absorbed only from the surrounding air. Thus, during the by a direct transmission of heat from the air to the cooling agent. During the idle hours on the other hand thestransmission of heat takes place through the medium of the 0001- working periods the air is cooled exclus vely i ing agent in the space 9 the cooling agent then only serving as a conductor of heat.

Claims.

1. A coolingapparatus having an outer cooling surface and consisting of an outer heat conducting casing adapted to contain a refrigerant, a receptacle adapted to contain a congealable substance and arranged inside said casing so as to be surrounded by the refrigerant, and means for circulat ing the refrigerant through the casing.

2. A cooling apparatus having an outer cooling surface consisting of an outer heat conducting c lindrical casing having ribs at its outer sur ace and constructed to contain a refrigerant, a cylindrical receptacle adapted to contain a congealable substance and arranged centrally Within and spaced from the walls of said casing, a vacuum piping, means 'for connecting the casing at its upper end with said vacuum piping, and means for circulating a refrigerant through the space-between the casing and the receptacle.

3. In an apparatus of the character de-' scribed, a casing provided with longitudinal and radially arranged ribs, pended within an spaced from the walls and bottom of the casing adapted to contain a congealable substance, and means for circulating a refrigerant through the space hetween'the casing and receptacle.

4. In" an apparatus of the character described, the combination with a vacuum a receptacle suspiping, a connection interposed therein, and

asupport in the connection, of a cylindri cal-casing havlng 1ts open upper end connected to the connection, a cyllndr-lcal receptacle suspended from the support and arranged within and spaced from the walls and bottom of the casing adapted to contain ,a congealable substance, and means for circulating a refri erant through the space. between the casi'ng and receptacle.

' In testiinon whereof I afiix 'my signature in presence 0 two witnesses. 

